Mechanical properties of friction welded joint between Ti-6Al-4V alloy and Al-Mg alloy (AA5052)

• Published in: Science and technology of welding and joining Vol. 10; no. 6; pp. 666 - 672
• Main Authors: Kimura, M., Nakamura, S., Kusaka, M., Seo, K., Fuji, A.
• Format: Journal Article
• Language: English
• Published: London, England Taylor & Francis 01.12.2005; SAGE Publications
• Subjects: ALUMINIUM ALLOY; FRICTION WELDING; INTERMETALLIC COMPOUND LAYER; JOINT EFFICIENCY; SOFTENING; TITANIUM ALLOY; JOINT EFFICIENCY; TITANIUM ALLOY; ALUMINIUM ALLOY; SOFTENING; INTERMETALLIC COMPOUND LAYER; FRICTION WELDING
• ISSN: 1362-1718; 1743-2936
• DOI: 10.1179/174329305X57455

The present paper describes the mechanical properties of a friction welded joint between Ti-6Al-4V alloy and Al-Mg alloy (AA5052). The Ti-6Al-4V/AA5052-H112 joint, made at a friction speed of 27.5 rev s −1 , friction pressure of 30 MPa, friction time of 3.0 s, and forge pressure of 60 MPa, had 100% joint efficiency and fractured in the AA5052-H112 base metal. The Ti-6Al-4V/AA5052-H34 joint, made under the same friction welding conditions, did not achieve 100% joint efficiency and it fractured in the AA5052-H34 base metal because the AA5052-H34 base metal had softened under friction heating. The joints made at low friction speed or using short friction time showed fracture at the welded interface because a sufficient quantity of heat for welding could not be produced. However, the joints made at high friction speed or using long friction time were also fractured at the welded interface: in this instance, the welded interface also had an intermetallic compound layer consisting of Ti 2 Mg 3 Al 18 . The Ti-6Al-4V/AA5052-H34 joint made at a friction speed of 27.5 rev s −1 with friction pressure of 150 MPa, friction time of 0.5 s, and forge pressure of 275 MPa had 100% joint efficiency and fractured in the AA5052-H34 base metal, although the AA5052-H34 side softened slightly. In conclusion, the Ti-6Al-4V/AA5052-H112 joint and Ti-6Al-4V/AA5052-H34 joint had 100% joint efficiency and fractured in the AA5052 base metal when made under the friction welding conditions described above.